A 50-year-old single man lives as a freeloading houseguest at his coworker's home, a pathetic man who stays shut in the house every day, forgetting his obligations. But inside him, a desire no one knows begins to grow. One night, that lust reaches its breaking point. He slips a drug into his coworker's drink—aphrodisiac for the wife, erection pills for himself. As a result, the coworker falls into a deep sleep, leaving him alone with his wife. Her body heats up, and seeing his erect cock, she remains in that state until morning...!?